您好我正在尝试使用ffmpeg命令将未解码的h264格式用于其他客户端应用程序。消费者应用程序只是读取h264。现在我如何优化以下命令？我的机器有GPU，我看到只使用了CPU，有什么我可以添加的吗？
ffmpeg -pix_fmt yuv420p -hide_banner -y -f v4l2 -vcodec h264 -video_size 1280x1020 -i /dev/video0 out.h264
打印参考的详细信息粘贴在下面 -
user@ubuntu$ ffmpeg -pix_fmt yuv420p -hide_banner -y -f v4l2 -vcodec h264 -video_size 1280x1020 -i /dev/video0 out.h264
[video4linux2,v4l2 @ 0x17e0a20] The V4L2 driver changed the video from 1280x1020 to 1280x720
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 871.695509, bitrate: N/A
Stream #0:0: Video: h264 (Constrained Baseline), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], -5 kb/s, 30 fps, 30 tbr, 1000k tbn, 60 tbc
No pixel format specified, yuvj420p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x1b80ac0] using SAR=1/1
[libx264 @ 0x1b80ac0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x1b80ac0] profile High, level 3.1
Output #0, h264, to 'out.h264':
Metadata:
encoder : Lavf56.40.101
Stream #0:0: Video: h264 (libx264), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 30 tbn, 30 tbc
Metadata:
encoder : Lavc56.60.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 1242 fps= 30 q=-1.0 Lsize= 4092kB time=00:00:41.33 bitrate= 811.1kbits/s dup=0 drop=4
video:4092kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
[libx264 @ 0x1b80ac0] frame I:5 Avg QP:17.23 size: 59416
[libx264 @ 0x1b80ac0] frame P:341 Avg QP:20.29 size: 8344
[libx264 @ 0x1b80ac0] frame B:896 Avg QP:24.94 size: 1170
[libx264 @ 0x1b80ac0] consecutive B-frames: 3.4% 1.1% 0.5% 95.0%
[libx264 @ 0x1b80ac0] mb I I16..4: 21.7% 46.7% 31.6%
[libx264 @ 0x1b80ac0] mb P I16..4: 1.8% 1.9% 0.4% P16..4: 33.2% 5.0% 3.9% 0.0% 0.0% skip:53.8%
[libx264 @ 0x1b80ac0] mb B I16..4: 0.1% 0.1% 0.0% B16..8: 18.8% 0.6% 0.1% direct: 0.5% skip:79.8% L0:41.7% L1:55.6% BI: 2.7%
[libx264 @ 0x1b80ac0] 8x8 transform intra:46.9% inter:56.0%
[libx264 @ 0x1b80ac0] coded y,uvDC,uvAC intra: 33.9% 42.8% 12.2% inter: 3.0% 5.9% 0.1%
[libx264 @ 0x1b80ac0] i16 v,h,dc,p: 14% 44% 12% 30%
[libx264 @ 0x1b80ac0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 32% 29% 2% 4% 3% 5% 2% 5%
[libx264 @ 0x1b80ac0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 30% 13% 4% 8% 6% 7% 3% 5%
[libx264 @ 0x1b80ac0] i8c dc,h,v,p: 57% 23% 17% 2%
[libx264 @ 0x1b80ac0] Weighted P-Frames: Y:1.8% UV:0.0%
[libx264 @ 0x1b80ac0] ref P L0: 65.9% 4.5% 21.6% 8.0% 0.1%
[libx264 @ 0x1b80ac0] ref B L0: 88.2% 10.0% 1.9%
[libx264 @ 0x1b80ac0] ref B L1: 95.6% 4.4%
[libx264 @ 0x1b80ac0] kb/s:809.79